Question

Can anyone help me with this question?
Given that X = [3, 5) and Y = (4, 9). Find A ∪ B

Answer 1

A u B would be (3,9)

Answer 2

A ∪ B = [3, 9)

Explanation:

Set X is 3, and all number greater than 3 up, but not including, 5.

Set Y is all numbers from 4 to 9, but not including 4 or 9.

The union of the sets is all numbers from 3 up to 9, including 3 but not including 9.
A ∪ B = [3, 9)